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    发明专利
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    公开(公告)号：AT550317T

    公开(公告)日：2012-04-15

    申请号：AT09781542

    申请日：2009-08-06

    Applicant: BASF SE

    Inventor： PENZEL ULRICH ,  MATTKE TORSTEN ,  WOELFERT ANDREAS ,  JACOBS JOHANNES ,  CHENG TSUNG-CHIEH ,  HEINEN KERSTIN ,  STROEFER ECKHARD ,  MAIXNER STEFAN ,  MACKENROTH WOLFGANG ,  TRAGUT CHRISTIAN ,  THIELE KAI ,  WON MYUNG UN

    IPC: C07C263/10

    Abstract: The invention relates to a process for preparing isocyanates by reacting the corresponding amines with phosgene in the liquid phase, if appropriate in the presence of at least one inert medium, in which the amine and the phosgene are first mixed in a mixing chamber (1) to give a reaction mixture and the reaction mixture is fed to a reactor, the amine being added through an orifice (3) arranged coaxially to the mixing chamber (1) and the phosgene being added through feed orifices (5) in at least two planes (7, 9) arranged at right angles to the axis (11) of the mixing chamber (1), or the phosgene being added through the orifice (3) arranged coaxially to the mixing chamber and the amine through the feed orifices (5) in at least two planes (7, 9) arranged at right angles to the axis (11) of the mixing chamber (1). At least one plane (9) is arranged upstream and at least one plane (7) downstream of the orifice (3) arranged coaxially to the mixing chamber (1) in main flow direction of the reaction mixture. The mean residence time of the reaction mixture in the mixing chamber (1) is not more than 20 ms.

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